Aiyima A07 - measurements/performance analysis?

[somebodyelse]

"..13A through a 2.5mm DC coaxial power plug- something that would just never happen..."

What is the specification for this plugs?

These specific ones who knows - ask @AIYIMA for the datasheet? Most that size are rated 24V 3A or 5A. Some manufacturers have high current versions but the highest I've seen is 10A 24V. I've not seen any rated over 30V either.

 

[tomtoo]

These specific ones who knows - ask @AIYIMA for the datasheet? Most that size are rated 24V 3A or 5A. Some manufacturers have high current versions but the highest I've seen is 10A 24V. I've not seen any rated over 30V either.

Thanks, looked and did not find any specifications about all this plugs. I think voltage is not the problem. But it would be realy interesting, for what amperage this plugs are realy build?

 

[NTK]

Here is the Switchcraft barrel type DC power connector product page for your reference. They max out at 11 amp.
http://www.switchcraft.com/Category.aspx?Parent=943

 

[ModDIY]

11A at 48v gives 528w, which is more than enough when using a 500w SMPS.

 

[somebodyelse]

Here is the Switchcraft barrel type DC power connector product page for your reference. They max out at 11 amp.
http://www.switchcraft.com/Category.aspx?Parent=943

That's only with the 2mm pin though - for 2.5mm they top out at 7.5A - and still 24V. Oddly RS have those Switchcraft sockets listed as 13A. Farnell have a Cliff socket rated at 10A 24V but no datasheet for it.

 

[Bruce Morgen]

This talk about power connector specs is just silly considering that the current demand of a Class D amp -- with 80+ percent efficiency -- closely tracks the volume of the material being played. That means that any current demand anywhere near double digits is going to be momentary and intermittent unless the input is a test tone, whereas the formal factory current specs of a connector are based on steady current demand, e.g. from an LED array. The 5.5 x 2.5mm coaxial DC power connection of the A07 is more than adequate and IMO not worth another moment's thought.

 

[Tangband]

The power supply that follows Aiyima a07 is a 32 V 5 A unit.
The power with such power supply is about 56 Watts/Chanel, with really low distortion in 8 ohm 20-20000 Hz , and about 100 Watts in 4 ohm.

 

[Vict0r]

I'm looking for a good desktop amp that won't break the bank but because of all this arguing, I still don't know if this is a good amplifier or not.

 

[somebodyelse]

I'm looking for a good desktop amp that won't break the bank but because of all this arguing, I still don't know if this is a good amplifier or not.

It seems to be a decent example of the breed. It's not state of the art, but you shouldn't expect that at this price. One has apparently been sent in for measurement, so if you can wait a while we'll find out how good the performance really is. The criticism here applies equally to pretty much all the competing amps in the segment - they claim power output levels that can't realistically be achieved with the hardware supplied, and even if they could the distortion would be ~10%. The discussion of the DC connector is around whether there are any on the market that could supply the specified power level, but since that power level is unachievable it's moot. In reality for desktop use you won't be using anywhere near that much power, and it won't be a problem.

 

[Vict0r]

It seems to be a decent example of the breed. It's not state of the art, but you shouldn't expect that at this price. One has apparently been sent in for measurement, so if you can wait a while we'll find out how good the performance really is. The criticism here applies equally to pretty much all the competing amps in the segment - they claim power output levels that can't realistically be achieved with the hardware supplied, and even if they could the distortion would be ~10%. The discussion of the DC connector is around whether there are any on the market that could supply the specified power level, but since that power level is unachievable it's moot. In reality for desktop use you won't be using anywhere near that much power, and it won't be a problem.

Patience is a virtue, right? I'm not in a hurry at all. Got my trusty & crusty NAD 3020 to tide me over.

 

[tomtoo]

This talk about power connector specs is just silly considering that the current demand of a Class D amp -- with 80+ percent efficiency -- closely tracks the volume of the material being played. That means that any current demand anywhere near double digits is going to be momentary and intermittent unless the input is a test tone, whereas the formal factory current specs of a connector are based on steady current demand, e.g. from an LED array. The 5.5 x 2.5mm coaxial DC power connection of the A07 is more than adequate and IMO not worth another moment's thought.

Thats not the point. A plug should support max. amperage permanent. Thats security. It has absolutly nothing to do with peak current. If a plug is specified for 10A permanent, than use it not for more even it could do much more peak. Its better to have a secure connector. The roof is on fire is a good song, but nothing i like to have.

 

[ModDIY]

This talk about power connector specs is just silly considering that the current demand of a Class D amp -- with 80+ percent efficiency -- closely tracks the volume of the material being played. That means that any current demand anywhere near double digits is going to be momentary and intermittent unless the input is a test tone, whereas the formal factory current specs of a connector are based on steady current demand, e.g. from an LED array. The 5.5 x 2.5mm coaxial DC power connection of the A07 is more than adequate and IMO not worth another moment's thought.

Completely agree with your point of view. I have a TPA3251 which I am powering with an SMPS I had on hand, a 36vdc 12A. From one to this voltage of 36, as much for the 3251 or the 3255, there is enough power for normal to fairly high listening. Do not worry with the DC plug, with an efficiency of almost 90% at very high volume, your ears and / or your speakers will ask for mercy long before ... lol